.TH "rtcSetGeometryTimeStepCount" "3" "" "" "Embree Ray Tracing Kernels 3"
.SS NAME
.IP
.nf
\f[C]
rtcSetGeometryTimeStepCount\ \-\ sets\ the\ number\ of\ time\ steps\ of\ the
\ \ geometry
\f[]
.fi
.SS SYNOPSIS
.IP
.nf
\f[C]
#include\ <embree3/rtcore.h>

void\ rtcSetGeometryTimeStepCount(
\ \ RTCGeometry\ geometry,
\ \ unsigned\ int\ timeStepCount
);
\f[]
.fi
.SS DESCRIPTION
.PP
The \f[C]rtcSetGeometryTimeStepCount\f[] function sets the number of
time steps for multi\-segment motion blur (\f[C]timeStepCount\f[]
parameter) of the specified geometry (\f[C]geometry\f[] parameter).
.PP
For triangle meshes (\f[C]RTC_GEOMETRY_TYPE_TRIANGLE\f[]), quad meshes
(\f[C]RTC_GEOMETRY_TYPE_QUAD\f[]), curves
(\f[C]RTC_GEOMETRY_TYPE_CURVE\f[]), and subdivision geometries
(\f[C]RTC_GEOMETRY_TYPE_SUBDIVISION\f[]), the number of time steps
directly corresponds to the number of vertex buffer slots available
(\f[C]RTC_BUFFER_TYPE_VERTEX\f[] buffer type).
For these geometries, one vertex buffer per time step must be specified
when creating multi\-segment motion blur geometries.
.PP
For instance geometries (\f[C]RTC_GEOMETRY_TYPE_INSTANCE\f[]), a
transformation must be specified for each time step (see
\f[C]rtcSetGeometryTransform\f[]).
.PP
For user geometries, the registered bounding callback function must
provide a bounding box per primitive and time step, and the intersection
and occlusion callback functions should properly intersect the
motion\-blurred geometry at the ray time.
.SS EXIT STATUS
.PP
On failure an error code is set that can be queried using
\f[C]rtcDeviceGetError\f[].
.SS SEE ALSO
.PP
[rtcNewGeometry]
